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Fe b. 19, 1929.

1,702,344 G. G. GRIEST PRESS Filed April 5, 1926 2 Sheets-Sheet 1INVENTOR $0 0 By W A TTORNEY.

Patented Feb. I9, 1929.

UNITED STATES GEORGE G. GRIEST, 01:" CINCINNATI, OHIO. I

PRESS.

Application filed April 3, 1926. Serial No. 99,591.

My invention relates to the general class of presses and particularly tothe-type of press which is utilized for pressing garments and otherfabrics. It is the object of my in 5 vention to incorporate in a press,a source of power to provide a power, pressing stroke which willeliminate much of the fatigue which an operator experiences in operatinga manual or foot power press. It is specifilo cally my object to providesuch a source of power preferably in an electric motor of a typegenerally known as a torque'motor.

A further specific object is an electric control system for the electriclines through" which power is transmitted tothe torque motor, whichshall allow the press to "be manually operatable during either theentire stroke of the press, or during such a portion of the stroke thatan operator will *beunable to allow his hands to .remain beneath thepressing head during the application of power.

An electric torque motor is a motor which is so constructed'andelectrically connected,

which point the rotation will cease, but the coils ofthe motor will notbe burned out as in most other types of motor. The torque will becontinuously provided without injurious effect, until the circuit isopened. In my embodiment with the breaking of the circuit to the motor,I preferably movethe rotor in a reverse'direction until it has movedback to what was originally its starting position, so that I provide areciprocating stroke.

The object of my invention is to so construct connecting means betweenthe torque motor and the pressing head, that I am en- 40 motor for apressing stroke, thereby providing a power controlled stroke whichincreases as the pressing head engages the buck. In order to provide thesafety feature before noted, I provide a switch mounted in a fixedposition on the frame of the press, and a member adapted to close theswitch on one of the moving parts of the press. By arranging theposition ofthe closing member so thatit will not engage the switch untilan approximately closed position of the press is reached,I inhibit thepossibility of an operator having his hands he neath the head at thetime the torque motor is turned on. Reversely it will be within therealms of mechanical equivalency to meant.

that it will rotate when current is supplied until there is a'definiteretarding load at rack.

abled to utilize the operation of the torque standard on which thepressing mechanism is -mounted. The frame has a table2 whichexthe switchon a moving member with a fixed stop to engage it at certain positionsof movement.

I further provide a manually operable switch conveniently accessiblenear the handle, by which the press head may be manually operated sothat should the operator desire to operate the press manually, he onlyneeds to throw out the manually operable switch and the torque motorwill not be operative. p 7

fy invention consists in the combination of the torque motor and thecontrol mecharnsm by which it is engaged at certain pressing positions.

The above and other objects which will appear during the ensuingdescription are accomplished by that certain arrangement of partshereinafter described.

Referring to the drawings:

Figure 1 is a plan view of a garment press in which my invention isembodied.

Figure 2 is a side elevation showing the assembly shown in Figure 1, inwhich a torque motor is connected by means of a segmental rack arm toactuate thepressing head.

Figure 2 is a detail showing a straight Figure 3 is a side elevation ofamodification of the assembly shown in Figures 1 and 2-in which power isapplied to the pressing head through a reduction gear unit. Figure 4: isan end elevation of the modification shown in Figure 3.

, Figure 5 is an end elevation of a slightly difierent type of pressassembly in which the torque motor is so mounted as to actuate ahorizontally movable rack which has suitable driving connections withthepresshead.

Generally indicated at 1 is the frame or tends out frontwardly and onwhich the buck 3 is mounted. The pressing head 4 is mounted on a rockingarm 5, which is pivotally mounted as indicated at 6 in the frame of theAs indicated, the torque motor 7, may be suitably mounted on a bracketexpress.

tending from the frame, or the motor may be mounted directly on theframe. In thetype illustrated in Figures land 2, a lever 8 having alongarm 9 is pivotally mounted in a bracket 10. The torque motor may have agear drive 11,- which is engaged with a segmental racklEZ, which ispivoted to the long 9i With the actuation at the the long arm will bemoved upwardly, carrying with it the short arm 13, which is adapted toengage a link 14, which with the pressing head approximately in pressingposition will be aligned with the short arm 13. With the manual movementof the head away from pressing position, the link 14 which is pivoted tothe end of the rocker opposite the pressing head is moved. by an arm 15,which is pivoted to an end '16 of the link which extends above therocker arm. The arm 15 may be suitably mounted in a boss 17, which isextended from the'axlc 18 on which the rocker is mounted. The operationof the lever having a straight rack 12, will be similar to the mechanismshown in Figure 2 as will. be readily apparent.

In the modification shown in Figure 5, the lever 19 replaces the lever8, shown in Figures 1 and 2 and the lever 19 is pivotally mounted in aboss 20. Connecting both the rocker arm 5 and the end of the lever 19,is a forked arm 21, which carries an adjustable stop 22 which limits therelative i'novement of the lever 19 and the arm 21 to about the positionshown. The lever and the forked arm will move freely toward an angularrelative position, but t-hestop 22 limits the movement of the lever andthe fork into parallel alignment. A rack 23, which engages the gear onthe torque motor with movement to the left, as illustrated,- willelevate the rocker 5, which will move the pressing head against thebuck.

The modifications shown in Figures 3 and 4, illustrate an arrangement inwhich a reduction gear unit 24, is coupled with the driving shaft of thetorque motor, and a cable 25 connects the driving. pulley 26 of thereduction gear unit with the end of the long arm of the lever.

As will be noted from the wiring diagram shown in Figure 5, one of thelead lines 27, connects with a switch 28, which normally is in closedposition, but which may be opened by contact with the end of themanually operative plunger 29, From the switch 28, a line connects withthe switch 30, which is adapted to be closed only when the lever whichcarries the plunger 31 is in approximately pressing position; A lineconnects one. side of the switch 30, with the torque motor and theother. lead line may as shown be connected with the torque motor throughan adjustable resistance as indicated at 32. In Figure2, the switch 28is connected with the motor and a line from the motor is connected withthe switch 80, with which the other lead line 32 is connected.

The operation of the press is simple. An operator places a garment onthe buck and moves the pressing head manually to approximately pressingposition; The switch is then closed by engagement with the plunger 31,and the torque motor provides the power for the pressing operation. Withthe breaking of the circuit by opening the switch 28 the lever which isactuated by the motor is sufiici-entl-y heavy to pull the torque motorshaft back to its original starting position.

By connecting a rheostat in the supply line to the motor, I am able tocontrol the torque of the motor which provides a means of controllingthe power of the pressing engagement. This provides a simple way of adj11st ing the head pressure for different types of pressing work.

Modifications in structure will readily ocour to those skilled in theart, but in so far as their modifications are within the range ofmechanical equivalency, I consider them within the scope of myinvention.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

1. A press having a manually movable, pivotally mounted pressing head, alever connected with said pivotally mounted head, electric motor meanshaving a driving connection with an arm of said lever, electric lines tosaid motor means, a switch in one of said lines, and means of closingsaid switch under control of said movable head physically operatahlewith a master switch in one of said lines for controlling the breakingof the circult to' said motor means during closed position ofsaid firstnamed switch, and said clec trio mot-or means comprising a torque motor.

2. A press having a manually movable, pivotally mounted pressing head, alever connected with said pivotal-1 y mounted head, electric motor meanshaving a driving connection with an arm of said lever, electric lines tosaid motor means, a switch in one of said lines, and means of closingsaid switch under control of said movable head physically operatablewith a master switch in one of said lines for controlling the breakingof the circuit to said motor means during closed position of said firstnamed switch, and said electric motor means comprising a torque motor,with said lever mounted so as to reverse said motor with the opening ofthe circuit thereto, wh ereby a reciprocating stroke may be imparted tosaid pressing head.

3. In a garment pressing machine, a manually movable pressing head, anda torque motor, said head having connections therewith adapted, duringthe position of pressing engagement, to provide driving connectionsbetween said head and said motor, and means whereby said motor isenergized only when said head is substantially in pressing position.

l. In a garment pressing machine, a manually movable pressing head, anda, torque motor, said head having connections therewithadapted, duringthe position of pressing engagement, to provide driving connectionsbetween said head and said motor, means said head is substantially inpressing positlon, and electric clrcuit breaking means connected 1ncircult with said motor, said means adapted to break the motor circuitduring the manual movement of said head away from pressing position.

5. In a press, a manually movable pressing head, a rocking arm carryingsaid head, a torque motor, means providing a driving connection betweensaid motor and said rocking arm, during substantially pressing posi tionof said head, with the motor adapted to move said head to pressingposition, and counterbalancing means for moving said head away frompressing position.

6. In a press, a manually movable press ing head, a rocking arm carryingsaid head, a torque motor, means providing a driving con- 7 nectionbetween said motor and said rocking arm, during substantially pressingposition of said head, with the motor adapted to move said head-topressing position, and counterbalancing means for moving said head awayfrom pressing position, and automatic control means in the supply linesto said torque motor adapted to inhibit the operation of said motorexcepting in approximately pressing position.

7 In a press, a manually movable pressing head, a rocking arm. carryingsaid head,

a torque motor, means providing a driving connection between said motorand said rocking arm, during substantially pressing position of saidhead, with the motor adapted to move said head to pressing position, andcounterbalancing means for moving said head away from pressing position,and automatic control means in the supply lines to said torque motoradapted to inhibit the operation of said motor during positions of saidpressing head away from substantially pressing position.

8.1n a press, a pressing head, a'rocking arm carrying said head, atorque motor, means providing a driving connection between said motorand said rocking arm during substantially pressing position of saidhead, with the motor adapted to move said head to pressing position, anda weight counterbalancing means for moving said head away from pressingposition, and automatic control means in the supply lines to said torquemotor adapted to inhibit the operation of said motor during positions ofsaid pressing head away from substantially pressing position, andcontrolling means for the electrical supply to said motor providingmeans for controlling the pressing power of the pressing head to apredetermined-degree of pressure.

GEORGE G. GRIES T.

